From fe07ec19e212a68076560d243a2a935c54589068 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 10 Dec 2013 11:27:47 -0800 Subject: present: recursively set window pixmaps on flip Newly created windows inherit the pixmap of their parent, similarly, reparenting a tree inherits the pixmap of the destination tree. Making present preserve the invariant that unredirected windows always have the same pixmap as their parent ensures that the above cases work correctly. v2: name the recursive function to 'set_tree_pixmap' instead of 'set_window_pixmap' Signed-off-by: Keith Packard Reviewed-by: Adam Jackson --- present/present.c | 44 +++++++++++++++++++++++++++++++++++++------- 1 file changed, 37 insertions(+), 7 deletions(-) diff --git a/present/present.c b/present/present.c index ffbb0b370..50bd05539 100644 --- a/present/present.c +++ b/present/present.c @@ -312,6 +312,36 @@ present_flip_idle(ScreenPtr screen) } } +struct pixmap_visit { + PixmapPtr old; + PixmapPtr new; +}; + +static int +present_set_tree_pixmap_visit(WindowPtr window, pointer data) +{ + struct pixmap_visit *visit = data; + ScreenPtr screen = window->drawable.pScreen; + + if ((*screen->GetWindowPixmap)(window) != visit->old) + return WT_DONTWALKCHILDREN; + (*screen->SetWindowPixmap)(window, visit->new); + return WT_WALKCHILDREN; +} + +static void +present_set_tree_pixmap(WindowPtr window, PixmapPtr pixmap) +{ + struct pixmap_visit visit; + ScreenPtr screen = window->drawable.pScreen; + + visit.old = (*screen->GetWindowPixmap)(window); + visit.new = pixmap; + if (visit.old == visit.new) + return; + TraverseTree(window, present_set_tree_pixmap_visit, &visit); +} + static void present_unflip(ScreenPtr screen) { @@ -321,10 +351,10 @@ present_unflip(ScreenPtr screen) assert (!screen_priv->flip_pending); if (screen_priv->flip_window) - (*screen->SetWindowPixmap)(screen_priv->flip_window, - (*screen->GetScreenPixmap)(screen)); + present_set_tree_pixmap(screen_priv->flip_window, + (*screen->GetScreenPixmap)(screen)); - (*screen->SetWindowPixmap)(screen->root, (*screen->GetScreenPixmap)(screen)); + present_set_tree_pixmap(screen->root, (*screen->GetScreenPixmap)(screen)); /* Update the screen pixmap with the current flip pixmap contents */ @@ -527,10 +557,10 @@ present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc) * 2) Set current flip window pixmap to the new pixmap */ if (screen_priv->flip_window && screen_priv->flip_window != window) - (*screen->SetWindowPixmap)(screen_priv->flip_window, - (*screen->GetScreenPixmap)(screen)); - (*screen->SetWindowPixmap)(vblank->window, vblank->pixmap); - (*screen->SetWindowPixmap)(screen->root, vblank->pixmap); + present_set_tree_pixmap(screen_priv->flip_window, + (*screen->GetScreenPixmap)(screen)); + present_set_tree_pixmap(vblank->window, vblank->pixmap); + present_set_tree_pixmap(screen->root, vblank->pixmap); /* Report update region as damaged */ -- cgit v1.2.3